Granted Patent
Utility
US 5,221,721 · App. 07/911,422
Polymerizable composition
Inventor:
Christopher D. Selvig
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Jul 10, 1992
Inventor
Christopher D. Selvig
Assignee (at issue)
PPG Industries, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.